for IPv6. */
extern struct hostent *gethostbyname2 __P ((__const char *__name, int __af));
+#ifdef __USE_UNIX98
+/* Return entry from host data base which address match ADDR with
+ length LEN and type TYPE in newly allocated buffer. */
+extern struct hostent *getipnodebyaddr __P ((__const char *__addr,
+ size_t __len, int __type,
+ int *__error_num));
+
+/* Return entry from host data base for host with NAME and newly allocated
+ buffer. */
+extern struct hostent *getipnodebyname __P ((__const char *__name, int __type,
+ int __flags, int *__error_num));
+
+/* Free structure returned by previous `getipnodebyaddr' or `getipnodebyname'
+ call. */
+extern void freehostent __P ((struct hostent *__ptr));
+#endif
+
#ifdef __USE_MISC
/* Reentrant versions of the functions above. The additional
arguments specify a buffer of BUFLEN starting at BUF. The last